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Related Experiment Video

Updated: May 7, 2026

Assembly and Characterization of Polyelectrolyte Complex Micelles

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

Pion distribution amplitude from lattice QCD.

I C Cloët¹, L Chang, C D Roberts

¹Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.

Physical Review Letters

|September 17, 2013

Summary

Researchers developed a method to approximate the pion

Area of Science:

High Energy Physics
Quantum Chromodynamics
Particle Physics

Background:

The pion's valence-quark distribution amplitude (PDA) is crucial for understanding hadron structure.
Lattice quantum chromodynamics (QCD) simulations provide insights into QCD but often require approximations.
Dyson-Schwinger equation analyses offer theoretical predictions for hadron properties.

Purpose of the Study:

To develop a method for obtaining accurate pointwise approximations of the pion's valence-quark distribution amplitude (PDA) using limited moments.
To compare the derived PDA with theoretical predictions and assess its behavior at high energy scales.

Main Methods:

Utilizing a novel method to approximate the pion's PDA from a limited set of moments.
Connecting the method to the single nontrivial moment accessible in lattice-regularized QCD simulations.

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Last Updated: May 7, 2026

Assembly and Characterization of Polyelectrolyte Complex Micelles

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Published on: March 2, 2020

Setting Limits on Supersymmetry Using Simplified Models

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Published on: November 15, 2013

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Published on: June 8, 2018

Analyzing the behavior of the PDA under leading-order evolution.

Main Results:

The method yields a broad, concave PDA that aligns with Dyson-Schwinger equation predictions.
The PDA remains broad even at energy scales exceeding 100 GeV.
This broadness indicates the persistent influence of dynamical chiral symmetry breaking.

Conclusions:

The asymptotic distribution is an inadequate approximation for the pion's PDA at experimentally relevant energy scales.
Expectations based on the asymptotic distribution for pion form factors need revision.
The findings highlight the importance of non-perturbative effects in understanding pion structure.